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A device and method for advanced treatment of landfill leachate

A landfill leachate and advanced treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as complex components and environmental pollution

Active Publication Date: 2015-12-02
张列宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The leachate of urban waste landfill is a kind of high-concentration organic wastewater with complex components. If it is directly discharged into the environment without treatment, it will cause serious environmental pollution.

Method used

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  • A device and method for advanced treatment of landfill leachate

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Embodiment Construction

[0037] The landfill leachate advanced treatment device provided by the invention is as figure 1 As shown, its main structure includes:

[0038] The horizontal spiral unloading decanter centrifuge 6 is composed of a centrifuge casing, a drum 5, a small spiral disk 2, a large spiral disk 4, a differential 42, a bearing seat and a base 43, etc.

[0039] Landfill leachate enters from the feed port 1 of the centrifuge. Under the action of the high-speed rotating drum and the screw with the same rotation direction as the rotating drum and slightly higher or lower rotating speed than the rotating drum, the high-speed rotating drum generates strong centrifugal force to The solid phase particles with a higher density than the liquid phase settle to the inner wall of the drum. Due to the different rotational speeds of the screw and the drum, there is a relative motion between the two (that is, a difference in rotational speed). The solid phase is pushed to the small spiral disk 2 and d...

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Abstract

The invention discloses a garbage leachate advanced treatment method which comprises the following steps: garbage leachate enters through a centrifugal machine feed port, suspensions with different densities are settled and stratified, the separated sewage enters an aerobic biomembrane reactor, degradable organic matters in the garbage leachate are removed in the aerobic biomembrane reactor, and effluent water of the aerobic biomembrane reactor is introduced into a table-flap subsurface flow artificial wetland to remove nondegradable organic matters; and the effluent water of the table-flap subsurface flow artificial wetland is sprayed into a surface layer turbulence screening filter, the screening filter filler performs filtration, adsorption, ion exchange and coagulation on the sewage and removes heavy metals, and the effluent water of a water tank of the surface layer turbulence screening filter enters a photocatalytic degradation reactor to kill pathogens, bacteria and trace amounts of organic matters in the sewage. The invention also discloses a device for implementing the method.

Description

technical field [0001] The invention relates to an ecological method for removing residual traces of refractory organic matter in sewage, in particular to a method for advanced treatment of landfill leachate, [0002] The invention also relates to a device for carrying out the method described above. Background technique [0003] The treatment of leachate in urban waste landfills has always been a very difficult problem in the design, operation and management of landfills. Leachate is the product of gravity flow of liquid in a landfill, mainly from precipitation and the embedded water of the waste itself. Since many factors may affect the properties of the leachate during the flow of the liquid, including physical factors, chemical factors and biological factors, the properties of the leachate vary within a considerable range. Generally speaking, its pH value is between 4-9, COD is in the range of 2000-62000mg / L, BOD 5 From 60 to 45000mg / L, the concentration of heavy meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 张列宇王雷席北斗王金生余红葛彪李曹乐李国文
Owner 张列宇
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